6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS2954
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage
SHUTDOWN Input Voltage,
Error Comparator Output
Voltage,(Note 9)
FEEDBACK Input Voltage
(Note 9) (Note 10)
Power Dissipation
Junction Temperature
Storage Temperature
ESD
-0.3 to +30V
Soldering Dwell Time, Temperature
Wave
4 seconds, 260°C
Infrared
4 seconds, 240°C
Vapor Phase
4 seconds, 219°C
-1.5 to +30V
OPERATING RATINGS
(Note 1)
Internally Limited
+150°C
-65°C to +150°C
2kV
Max. Input Supply Voltage
Junction Temperature Range
(T
J
) (Note 8)
AMS2954AC-X
AMS2954C-X
40V
-40°C to +125°C
ELECTRICAL CHARACTERISTICS
at Vs=Vout+1V, Ta=25°C, unless otherwise noted
.
AMS2954AC
Parameter
2.5 V Versions
(Note 16)
Output Voltage
-25°C
≤T
J
≤85°C
Full Operating Temperature
Range
100
µA ≤I
L
≤250
mA
TJ
≤T
JMAX
TJ = 25°C
(Note 3)
2.488
2.475
2.470
2.463
2.5
2.5
2.5
2.5
2.512
2.525
2.530
2.537
2.475
2.450
2.440
2.448
2.5
2.5
2.5
2.5
2.525
2.550
2.560
2.562
V
V
V
V
AMS2954C
Min.
Typ.
Max.
Conditions
(Note 2)
Min.
Typ.
Max.
Units
Output Voltage
3.0 V Versions
(Note 16)
Output Voltage
Output Voltage
3.3 V Versions
(Note 16)
Output Voltage
-25°C
≤T
J
≤85°C
Full Operating Temperature
Range
100
µA ≤I
L
≤250
mA
TJ
≤T
JMAX
TJ = 25°C
TJ = 25°C
(Note 3)
2.985
2.970
2.964
2.958
3.0
3.0
3.0
3.0
3.015
3.030
3.036
3.042
2.970
2.955
2.940
2.928
3.0
3.0
3.0
3.0
3.030
3.045
3.060
3.072
V
V
V
V
(Note 3)
Output Voltage
5 V Versions
(Note 16)
Output Voltage
-25°C
≤T
J
≤85°C
Full Operating Temperature
Range
100
µA ≤I
L
≤250
mA
TJ
≤T
JMAX
TJ = 25°C
3.284
3.267
3.260
3.254
3.3
3.3
3.3
3.3
3.317
3.333
3.340
3.346
3.267
3.251
3.234
3.221
3.3
3.3
3.3
3.3
3.333
3.350
3.366
3.379
V
V
V
V
(Note 3)
Output Voltage
All Voltage Options
Output Voltage
Temperature Coefficient
Line Regulation (Note 14)
Load Regulation (Note 14)
-25°C
≤T
J
≤85°C
Full Operating Temperature
Range
100
µA ≤I
L
≤250
mA
TJ
≤T
JMAX
4.975
4.95
4.94
4.925
5.0
5.0
5.0
5.0
5.025
5.050
5.06
5.075
4.95
4.925
4.90
4.88
5.0
5.0
5.0
5.0
5.05
5.075
5.10
5.12
V
V
V
V
(Note 12) (Note 4)
6V
≤V
in
≤30V
(Note 15)
100
µA ≤I
L
≤
250 mA
20
0.03
0.04
100
0.1
0.16
50
0.04
0.1
150
0.2
0.2
ppm/°C
%
%
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS2954
ELECTRICAL CHARACTERISTICS
(Note 2) (Continued)
AMS2954AC
PARAMETER
Dropout Voltage
(Note 5)
Ground Current
AMS2954C
Min.
Typ.
50
380
75
15
200
0.05
430
160
100
AMS2954C
1.25
1.27
1.21
1.185
40
1.235
1.26
1.285
60
50
V
V
nA
ppm/°C
Max.
80
600
120
20
500
0.2
CONDITIONS
(Note 2)
IL = 100µ A
IL = 250 mA
IL = 100
µA
IL = 250 mA
Min.
Typ.
50
380
75
15
200
0.05
430
160
100
AMS2954AC
1.22
Over Temperature (Note 7)
1.19
40
20
( Note 12 )
0.1
0.1
nA/°C
1.235
Max.
80
600
120
20
500
0.2
Units
mV
mV
µA
mA
mA
%/W
µV
rms
µV
rms
µV
rms
Current Limit
Thermal Regulation
Output Noise,
10Hz to 100KHz
Vout = 0
(Note 13)
CL = 1µF
CL = 200
µF
CL = 13.3
µF
(Bypass = 0.01
µF
pins 7 to 1)
8-Pin Versions only
Reference Voltage
Reference Voltage
Feedback Pin Bias Current
Reference Voltage Temperature
Coefficient
Feedback Pin Bias Current
Temperature Coefficient
Error Comparator
Output Leakage Current
Output Low Voltage
Upper Threshold Voltage
Lower Threshold Voltage
Hysteresis
Shutdown Input
Input logic Voltage
Shutdown Pin Input Current
(Note 3)
Regulator Output Current in
Shutdown (Note 3)
V
OH
60
= 30V
0.01
150
40
60
75
15
1
250
40
95
0.01
150
60
75
15
1
250
µA
mV
mV
Vin = 4.5V
IOL = 400µA
(Note 6)
(Note 6)
(Note 6)
Low (Regulator ON)
High (Regulator OFF)
Vs = 2.4V
Vs = 30V
(Note 11)
95
mV
mV
1.3
2
30
450
3
0.7
2
50
600
10
1.3
30
450
3
0.7
50
600
10
V
V
µA
µA
µA
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2:
Unless otherwise specified all limits guaranteed for V
IN
= ( V
ONOM
+1)V, I
L
= 100
µA
and C
L
= 1
µF
for 5V versions and 2.2µF for 3V and 3.3V
versions. Limits appearing in
boldface
type apply over the entire junction temperature range for operation. Limits appearing in normal type apply for T
A
= T
J
=
25°C Additional conditions for the 8-pin versions are FEEDBACK tied to V
TAP
, OUTPUT tied to SENSE and V
SHUTDOWN
≤
0.8V.
Note 3:
Guaranteed and 100% production tested.
Note 4:
Guaranteed but not 100% production tested. These limits are not used to calculate outgoing AQL levels.
Note 5:
Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below its nominal value measured at 1V
differential. At very low values of programmed output voltage, the minimum input supply voltage of 2V ( 2.3V over temperature) must be taken into account.
Note 6:
Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage measured at
V
IN
= ( V
ONOM
+1)V. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = Vout/Vref = (R1 + R2)/R2. For
example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95 mV x 5V/1.235 = 384 mV. Thresholds
remain constant as a percent of V
out
as V
out
is varied, with the dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
Note 7:
V
ref
≤V
out
≤
(V
in
- 1V), 2.3
≤V
in
≤30V,
100µA≤I
L
≤
250 mA, T
J
≤
T
JMAX
.
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS2954
Note 8:
The junction-to-ambient thermal resistance are as follows:60°C/W for the TO-220 (T), 73°C/W for the TO-263 (M), 80°C/W for the TO-252 (D),
90°C/W for the SOT-223 (with package soldering to copper area over backside ground plane or internal power plane
ϕ
JA
can vary from 46°C/W to
>90°C/W
depending on mounting technique and the size of the copper area), 105°C/W for the molded plastic DIP (P) and 160°C/W for the molded plastic SO-8 (S).
Note 9:
May exceed input supply voltage.
Note 10:
When used in dual-supply systems where the output terminal sees loads returned to a negative supply, the output voltage should be diode-clamped to
ground.
Note 11:
V
shutdown
≥
2V, V
in
≤
30V, V
out
=0, Feedback pin tied to 5V
TAP
.
Note 12:
Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.
Note 13:
Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 50mA load pulse at V
IN
=30V (1.25W pulse) for T =10 ms.
Note 14:
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects
are covered under the specification for thermal regulation.
Note 15:
Line regulation for the AMS2954 is tested at 150°C for I
L
= 1 mA. For I
L
= 100
µA
and T
J
= 125°C, line regulation is guaranteed by design to 0.2%.
See typical performance characteristics for line regulation versus temperature and load current.
BLOCK DIAGRAM AND TYPICAL APPLICATIONS
AMS2954-XX
3 Lead Packages
AMS2954-XX
8 Lead Packages
UNREGULATED DC
UNREGULATED DC
V
OUT
I
L
≤
150mA
8
INPUT
1
OUTPUT
2
+
SENSE
ERROR
AMPLIFIER
6
V
TAP
5
ERROR
4
GROUND
+
330kΩ
TO CMOS
OR TTL
SEE APPLICATION
HINTS
+
INPUT
OUTPUT
+
-
ERROR
AMPLIFIER
+
SEE APPLICATION
HINTS
V
OUT
I
L
≤
150mA
+
7
FEED-
BACK
FROM
CMOS
OR TTL
3
SHUT-
DOWN
+
50mV
+
-
+
-
+
1.23V
REFERENCE
GROUND
1.23V
REFERENCE
ERROR DETECTION COMPARATOR
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
AMS2954
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Current
20
GROUND CURRENT (mA)
OUTPUT VOLTAGE (V)
6
Dropout Characteristics
5V OUTPUT
Input Current
250
225
INPUT CURRENT (µA)
200
175
150
125
100
75
50
25
0
R
L
=
∞
5V OUTPUT
5
4
3
I
O
=250mA
I
O
=1mA
10
1
2
1
0
1
3
4
5
2
INPUT VOLTAGE (V)
6
0.1
1
50
100 150 200
LOAD CURRENT (mA)
250
0
0
1
2 3 4 5 6 7 8
INPUT VOLTAGE (V)
9 10
Input Current
270
240
210
180
150
120
90
75
60
45
30
15
0
5.06
5V OUTPUT
Temperature Drift of 3
Representative Units
160
5V OUTPUT
Quiescent Current
5V OUTPUT
OUTPUT VOLTAGE (V)
I
O
=250mA
INPUT CURRENT (mA)
5.04
5.02
5.0
4.98
4.96
0.2%
QUIESCENT CURRENT (µA)
140
120
100
80
I
L
= 0mA
I
L
= 1 mA
60
40
20
0
0
1
2 3
4 5
6
7
INPUT VOLTAGE (V)
8
0
1
2 3 4 5 6 7 8
INPUT VOLTAGE (V)
9 10
4.94
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Quiescent Current
120
QUIESCENT CURRENT (mA)
QUIESCENT CURRENT (µA)
5V OUTPUT
Quiescent Current
35
V
IN
= 6V
Quiescent Current
24
QUIESCENT CURRENT (mA)
5V OUTPUT
110
100
90
80
70
60
I
L
= 100µA
5V OUTPUT
30
25
20
15
10
5
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
V
IN
= 6V
I
L
= 250mA
21
18
15
12
9
6
3
0
0
1
2 3 4
5
6 7
INPUT VOLTAGE (V)
8
I
L
= 250mA
50
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (° C)
Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
嵌入式系统
